Add a test device which supports the kvmctl ioports,
so one can run the KVM unittest suite.
Intended Usage:
qemu-system-x86_64\
-device pc-testdev -serial stdio \
-device isa-debugexit,iobase=0xf4,access-size=4 \
-kernel /path/to/kvm/unittests/msr.flat
Where msr.flat is one of the KVM unittests, present on a
separate repo,
git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
Changes from v7:
* Fixed rebase mistake... again.
Changes from v6:
* Only use sys/mman.h and mprotect on non windows
platforms
Changes from v5:
* Fixed rebase mistake
Changes from v4:
* Pass iomem_buf as an opaque, as requested by Blue
* Ported to new MMIO schema, as requested by Jan
Changes from v3:
* Ported all register_ioport functions to memory API
Changes from v2:
* Rename struct testdev to PCTestdev
* Embed ioport_data into PCTestdev struct
* Porting most register_ioport functions to memory API
Changes from v1:
* Removed unused testdev member
* Renamed device to a less generic name, pc-testdev
Initial changes from initial attempt:
* Removed port 0xf1, since now kvm-unit-tests use
serial
* Removed exit code port 0xf4, since that can be
replaced by
-device isa-debugexit,iobase=0xf4,access-size=4
* Removed ram size port 0xd1, since guest memory
size can be retrieved from firmware, there's a
patch for kvm-unit-tests including an API to
retrieve that value.
CC: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Alexander Graf <ag...@suse.de>
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
Signed-off-by: Lucas Meneghel Rodrigues <l...@redhat.com>
---
hw/i386/Makefile.objs | 1 +
hw/pc-testdev.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 162 insertions(+)
create mode 100644 hw/pc-testdev.c
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index 56aaa9d..1ac5fc5 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -12,5 +12,6 @@ obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o
obj-y += kvm/
obj-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
+obj-y += pc-testdev.o
obj-y := $(addprefix ../,$(obj-y))
diff --git a/hw/pc-testdev.c b/hw/pc-testdev.c
new file mode 100644
index 0000000..1bea8ea
--- /dev/null
+++ b/hw/pc-testdev.c
@@ -0,0 +1,161 @@
+/*
+ * QEMU x86 ISA testdev
+ *
+ * Copyright (c) 2012 Avi Kivity, Gerd Hoffmann, Marcelo Tosatti
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/*
+ * This device is used to test KVM features specific to the x86 port, such
+ * as emulation, power management, interrupt routing, among others. It's meant
+ * to be used like:
+ *
+ * qemu-system-x86_64 -device pc-testdev -serial stdio \
+ * -device isa-debugexit,iobase=0xf4,access-size=2 \
+ * -kernel /home/lmr/Code/virt-test.git/kvm/unittests/msr.flat
+ *
+ * Where msr.flat is one of the KVM unittests, present on a separate repo,
+ * git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
+ */
+
+#ifndef _WIN32
+#include <sys/mman.h>
+#endif
+
+#include "hw.h"
+#include "qdev.h"
+#include "isa.h"
+#include "exec-memory.h"
+
+#define IOMEM_LEN 0x10000
+
+typedef struct PCTestdev {
+ ISADevice dev;
+ MemoryRegion iomem;
+ uint32_t ioport_data;
+ char iomem_buf[IOMEM_LEN];
+} PCTestdev;
+
+#define TYPE_TESTDEV "pc-testdev"
+#define TESTDEV(obj) \
+ OBJECT_CHECK(struct PCTestdev, (obj), TYPE_TESTDEV)
+
+static void test_device_irq_line(void *opaque, uint32_t addr, uint32_t data)
+{
+ struct PCTestdev *dev = opaque;
+ qemu_set_irq(isa_get_irq(&dev->dev, addr - 0x2000), !!data);
+}
+
+static void test_device_ioport_write(void *opaque, uint32_t addr, uint32_t
data)
+{
+ struct PCTestdev *dev = opaque;
+ dev->ioport_data = data;
+}
+
+static uint32_t test_device_ioport_read(void *opaque, uint32_t addr)
+{
+ struct PCTestdev *dev = opaque;
+ return dev->ioport_data;
+}
+
+static void test_device_flush_page(void *opaque, uint32_t addr, uint32_t data)
+{
+ hwaddr len = 4096;
+ void *a = cpu_physical_memory_map(data & ~0xffful, &len, 0);
+
+#ifndef _WIN32
+ /* We might not be able to get the full page, only mprotect what we
actually
+ have mapped */
+ mprotect(a, len, PROT_NONE);
+ mprotect(a, len, PROT_READ|PROT_WRITE);
+#endif
+ cpu_physical_memory_unmap(a, len, 0, 0);
+}
+
+static uint64_t test_iomem_read(void *opaque, hwaddr addr, unsigned len)
+{
+ struct PCTestdev *dev = opaque;
+ uint64_t ret = 0;
+ memcpy(&ret, &dev->iomem_buf[addr], len);
+ ret = le64_to_cpu(ret);
+
+ return ret;
+}
+
+static void test_iomem_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned len)
+{
+ struct PCTestdev *dev = opaque;
+ val = cpu_to_le64(val);
+ memcpy(&dev->iomem_buf[addr], &val, len);
+ dev->iomem_buf[addr] = val;
+}
+
+static const MemoryRegionOps test_iomem_ops = {
+ .read = test_iomem_read,
+ .write = test_iomem_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static const MemoryRegionPortio test_dev_portio_list[] = {
+ { 0xe0, 1, 1, .read = test_device_ioport_read, .write =
test_device_ioport_write, },
+ { 0xe0, 1, 2, .read = test_device_ioport_read, .write =
test_device_ioport_write, },
+ { 0xe0, 1, 4, .read = test_device_ioport_read, .write =
test_device_ioport_write, },
+ { 0xe4, 1, 4, .write = test_device_flush_page, },
+ { 0x2000, 24, 1, .write = test_device_irq_line, },
+ PORTIO_END_OF_LIST(),
+};
+
+static int init_test_device(ISADevice *isa)
+{
+ struct PCTestdev *dev = DO_UPCAST(struct PCTestdev, dev, isa);
+
+ PortioList *test_dev_port_list = g_new(PortioList, 1);
+ portio_list_init(test_dev_port_list, test_dev_portio_list,
+ NULL, "pc-testdev");
+ portio_list_add(test_dev_port_list, get_system_io(), 0x0);
+
+ memory_region_init_io(&dev->iomem, &test_iomem_ops, dev,
+ "pc-testdev", IOMEM_LEN);
+ memory_region_add_subregion(isa_address_space(&dev->dev), 0xff000000,
+ &dev->iomem);
+ return 0;
+}
+
+static void testdev_class_init(ObjectClass *klass, void *data)
+{
+ ISADeviceClass *k = ISA_DEVICE_CLASS(klass);
+
+ k->init = init_test_device;
+}
+
+static TypeInfo testdev_info = {
+ .name = "pc-testdev",
+ .parent = TYPE_ISA_DEVICE,
+ .instance_size = sizeof(struct PCTestdev),
+ .class_init = testdev_class_init,
+};
+
+static void testdev_register_types(void)
+{
+ type_register_static(&testdev_info);
+}
+
+type_init(testdev_register_types)
--
1.7.10.4
